Water bottle cap



FIG. 1 is a perspective view of the subject water bottle cap illustrating my new design;

FIG. 2 is a side view of the water bottle cap;

FIG. 3 is an opposite side view of the water bottle cap;

FIG. 4 is a front view of the water bottle cap;

FIG. 5 is a rear view of the water bottle cap; and,

FIG. 6 is a top view of the water bottle cap. 

CLAIM The ornamental design for a water bottle cap, as shown and described. 